关于有机磷农药在体内的分布。表述不正确的是() ["迅速分布全身","以肝含量最高","可透过血脑屏障","部分可透过胎盘屏障","以中枢神经系统内含量最高"]
[复合型非选择题]患者发热,小腿红、肿、痛2天。检查:小腿曲侧可见皮肤红肿、与周围组织边界不清,触痛明显、皮温明显增高。其感染累及的部位是() ["A.皮下蜂窝组织","皮肤及其管状淋巴管","皮肤及其网状淋巴管","皮肤及其毛细血管网","相邻的毛囊及所属皮脂腺"]
急性胰腺炎时血钙降低主要与以下哪种酶有关() ["血淀粉酶","磷脂酶","胰酶","脂肪酶","弹性蛋白酶"]
颅脑先天性畸形神经管闭合障碍见于以下各病,错误的是()。 ["脑膨出","ChiariⅡ畸形","脑裂畸形","颅裂畸形","胼胝体发育不全"]
双胎输血综合征,受血儿早期出现的情况有() ["心排血量增多","肾血流量增加","肝大","羊水过多","胎儿体重大于孕周"]
简述难产的原因。